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Collaborative production among multiple enterprises is inevitable for complex product development, typically in aeronautical and astronautical engineering. There are more complex links among product design, manufacturing process and production supply chain in that area. In order to achieve their interoperation and collaboration, it is critical to transmit information between processes correctly and...
In this paper we adopt the similarity principle to study GPR response to voids under road surface or in the levees and dams by cross-examination of GPR data acquired using both high-frequency antennas on laboratory bench-size models and low-frequency antennas in the field. In physical world the similarity principle is widely used in theoretical study and engineering practice. In short, by the similarity...
GPR is a nondestructive detection method which has been widely applied to detect defects in concrete structures. In field geotechnical engineering cases, it is very hard to observe anomalies caused by longitudinal defects using ground-based GPR detection, which produces great difficulties in data processing and interpretation. Compared with the traditional ground-based GPR, the cross-hole GPR can...
We successfully transmitted 100GHz-grid, 20 channels single-carrier 440-Gb/s super-Nyquist signal over 3600km. Record all-ETDM-based 110-GBaud PDM-QPSK is coherently detected by a real-time oscilloscope at 160 GSa/s with 65-GHz bandwidth, achieving a net SE of 4b/s/Hz.
We have demonstrated a novel single-mode continuous-wave narrow bandwidth emission and widely tunable external cavity laser biosensor that simultaneously achieves high resolution, high sensitivity and large dynamic range.
We have demonstrated a tunable external cavity ring laser, in which the lasing wavelength can be controlled by external illumination that excites a nonlinear dye within a photonic crystal resonant reflector.
This paper presents a comparative analysis between different control techniques for voltage source inverters (VSI), based on shunt active power filter. The main purpose is to study the behaviour of each technique for a given reference current. In addition, some simulations are presented in ATP. The reference signals tracking for different current control techniques and different converter topologies...
This article reports a new approach to measure the velocity and the mass flow distribution of granules in the vicinity of a spinning disc in order to improve fertiliser spreading in agriculture. In this approach, the acquisition system consists of a digital camera placed above the disc so that its view axis corresponds to the disc axle. This provides useful geometrical properties to develop a simple...
In Precision Agriculture, remote sensors such as imaging systems are commonly used to manage site-specific weeds. Although there are several algorithms using spatial information, few tests proving their efficiency have been performed on relevant database. In this paper we propose an innovative approach based on a simple model that simulates virtual crops to evaluate the robustness and efficiency of...
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